docs: add note about CF routes limit

Author: atinux

docs/content/1.docs/3.recipes/3.pre-rendering.md

@@ -25,7 +25,7 @@ export default defineNuxtConfig({
 })
 ```
 
-When running `nuxt build`, Nuxt will pre-render the `/` route and save the `index.html` file in the output directory. 
+When running `nuxt build`, Nuxt will pre-render the `/` route and save the `index.html` file in the output directory.
 
 ::callout{icon="i-ph-rocket-launch-duotone"}
 When deploying with NuxtHub on Cloudflare Pages, it will serve the pre-rendered HTML file directly from the edge for maximum performance and avoid CPU usage on the server.
@@ -50,10 +50,14 @@ defineRouteRules({
 This is equivalent of our example above in the `nuxt.config.ts` file.
 
 **Notes:**
+
 - A rule defined in `~/pages/foo/bar.vue` will be applied to `/foo/bar` requests.
 - A rule in `~/pages/foo/[id].vue` will be applied to `/foo/**` requests.
 
-::important{to="https://nuxt.com/docs/guide/going-further/experimental-features#inlinerouterules"}
+::important
+---
+to: https://nuxt.com/docs/guide/going-further/experimental-features#inlinerouterules
+---
 As this is an experimental feature, you need to enable it in your `nuxt.config.ts` files with `experimental: { inlineRouteRules: true }`.
 ::
 
@@ -128,10 +132,35 @@ export default defineNuxtConfig({
 
 When running `nuxt build`, Nuxt will pre-render all pages and save the `index.html` file in the `dist/` directory.
 
-::tip{to="https://nuxt.com/docs/getting-started/prerendering" target="_blank"}
+::tip{target="_blank" to="https://nuxt.com/docs/getting-started/prerendering"}
 Learn more about Nuxt prerendering.
 ::
 
+### Cloudflare 100 routes limit
+
+NuxtHub will generate a [`dist/_routes.json`](https://developers.cloudflare.com/pages/functions/routing/#create-a-_routesjson-file) for Cloudflare Pages, but it has a limit of 100 excluded routes (used for static assets).
+
+As each pre-rendered page will be added to the exclude list, we recommend to add your known pre-rendered pattern in the `nitro.cloudflare.pages.routes.exclude` option:
+
+```ts [nuxt.config.ts]
+export default defineNuxtConfig({
+  // ...
+  nitro: {
+    cloudflare: {
+      pages: {
+        routes: {
+          exclude: [
+            // we know that all docs and blog pages are pre-rendered
+            '/docs/*',
+            '/blog/*'
+          ]
+        }
+      }
+    }
+  }
+})
+```
+
 ## Caveats
 
 If you are using authentication in your application such as [`nuxt-auth-utils`](https://github.com/Atinux/nuxt-auth-utils), you need to remember that the authentication state will not be available during the pre-rendering process.